Back in August 2010, AnandTech published its Sandy Bridge preview—an in-depth examination designed to tantalize consumers and industry alike as to what Intel’s latest production has to offer. I would like to review some of the major points as an introduction to the platform.

As you would expect, the new socket 1155 processors are incompatible with socket 1156 motherboards. The new motherboards will come in H and P varieties, with the H series taking advantage of the graphics on the processor die, whereas the P series will utilize discrete graphics only. At launch, both P67 and H67 chipsets will be available, with the H61 chipset released during Q1 2011.

Despite losing the on-chip graphics with the P series, these boards will support dual PCIe lanes running at x8 speed. The PCIe lane bandwidth of the new chipset is double that of previous Intel chipsets, firstly to increase correlation with chipsets, but also to help support SATA 6 Gb/s which runs over PCIe 1x, and future movement into USB 3.0.

The P/H67 chipsets will natively support two SATA 6Gb/s ports, with the possibility of some manufacturers adding an NEC/Marvell/Etron chip to increase this to four. Four SATA 3Gb/s will be included as standard. No USB 3.0 native support is included, much to the disappointment of some consumers, but again manufacturers at their own discretion can add an chip to give a couple of ports in the back panel, or a few more through onboard headers. USB 2.0 is provided copiously, with at least 10 ports available across the range, through either the back panel or onboard headers.

One major benefit, which I wholeheartedly approve of, is that the holes for the new coolers are identical to the socket 1156 coolers, and various board manufacturers may include socket 775 holes as well, allowing customers to keep their old air or water coolers.

You may remember the following comparison table:

Chipset Comparison

P67

H67

H61

P55

H57

H55

CPU Support

Sandy Bridge
LGA-1155

Sandy Bridge
LGA-1155

Sandy Bridge
LGA-1155

Lynnfield / Clarkdale LGA-1156

Lynnfield / Clarkdale LGA-1156

Lynnfield / Clarkdale LGA-1156

CPU PCIe Config

1 x 16 or 2 x 8 PCIe 2.0

1 x 16
PCIe 2.0

1 x 16
PCIe 2.0

1 x 16 or 2 x 8 PCIe 2.0

1 x 16
PCIe 2.0

1 x 16
PCIe 2.0

RAID Support

Yes

Yes

No

Yes

Yes

No

USB 2.0 Ports

14

14

10

14

14

12

SATA Total (Max Number of 6Gbps Ports)

6 (2)

6 (2)

4 (0)

6 (0)

6 (0)

6 (0)

PCIe Lanes

8 (5GT/s)

8 (5GT/s)

6 (5GT/s)

8 (2.5GT/s)

8 (2.5GT/s)

6 (2.5GT/s)

Another major step over previous sockets and chipsets is the introduction of UEFI (Unified Extensible Firmware Interface). UEFI is a replacement for the older BIOS firmware present in most motherboards, designed to enhance the usability of the motherboard firmware over previous BIOS implementations. Major benefits include a graphical interface, the ability to use a mouse, improved possibility for overclocking on the fly, and the capability of booting from GPT hard drives (those with capacities over 2.2TB where the MBR partition table is unsuitable). Each implementation of the UEFI will be different from manufacturer to manufacturer, and we will look at ASRock’s implementation here today.

One other aspect of note with the new chipsets is the overclockability prospects on Sandy Bridge. Intel’s decision to integrate the clock generator onto the chipset die means that every BUS speed is a derivative of the clock speed. Various buses are highly sensitive to the clock speed, and will allow very little overclocking—maybe, at most, 1 or 2MHz above 100MHz. Thus, for the most part, people will leave the clock speed alone and end up adjusting the multiplier to increase the CPU speed (with the appropriate multiplier unlocked chip), and the divider to increase the RAM speed. For complete scalability, both will have to be adjusted in order for the CPU to reach optimum efficiency. On the P67 chipset, memory speeds up to 2133MHz are selectable, as well as adjustment of the memory sub-timings. We will examine the UEFI options ASRock provides, but please check Anand’s CPU overview for the full Sandy Bridge scaling picture.

On that note, let us have a look at one of the first Sandy Bridge motherboards to market, the ASRock P67 Extreme4.

From what I understood, none have on-board graphics, and the H series is designed to use the on-chip (CPU) graphics, while the P series is designed for discrete graphics (altough you can use the on-chip graphics as well).Reply

Not quite. If you Anand's article from today about Sandy Bridge, I got the opposite impression.

P can not use the on-CPU graphics at all but supports full overclocking of CPU and memory. H can use on-CPU or discrete graphics (or both simultaneously, it would seem), but only supports memory overclocking. Z is meant to fix that by allowing full overclocking and including the "FDI" (flexible display interface) needed to access the on-CPU graphics processor.Reply

What I'm confused about is this. The K series gives us the faster GPU, and the ability to fully overclock the cpu. However you cant use the GPU since the whole reason for getting the K sku is the overclock, thus the P series board and no GPU.

Where does this leave QuickSync (arguably the top selling point)? From what I understand we cannot have a fully overclocked QuickSync CPU right?Reply